(G)ZDoom basictypes.h error somehow worked around in vcproj

// windef.h, included by windows.h, has its own incompatible definition
// of DWORD as a long. In files that mix Doom and Windows code, you
// must define USE_WINDOWS_DWORD before including doomtype.h so that
// you are aware that those files have a different DWORD than the rest
// of the source.

#ifndef USE_WINDOWS_DWORD
typedef uint32					DWORD;
#endif
typedef uint32					BITFIELD;
typedef int						INTBOOL;